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Astronomy and Astrophysics Forum

Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.

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Graduate Did a Giant Impact Make the Martian Moons?

May 19, 2015 · Replies 2 · Jun 1, 2015

Replies: 2

Views: 2K

Graduate Is There Evidence of a Type Ia Supernova Formed via the Single Degenerate Mode?

May 21, 2015 · Replies 1 · May 31, 2015

Replies: 1

Views: 2K

Undergrad Is the Density of Points in an Interval Twice as Much with Double Length?

May 30, 2015 · Replies 7 · May 31, 2015

Replies: 7

Views: 2K

Undergrad Understanding the Units of Permittivity of Free Space in Coulomb's Law

May 29, 2015 · Replies 4 · May 30, 2015

Replies: 4

Views: 2K

Undergrad Are Asteroids Formed by Collisions or Accretion?

May 28, 2015 · Replies 4 · May 30, 2015

Replies: 4

Views: 2K

Graduate CMB photons, why are they still around?

May 25, 2015 · Replies 15 · May 29, 2015

Replies: 15

Views: 3K

Graduate Where do things go after they were sucked by a Blackhole?

May 21, 2015 · Replies 57 · May 28, 2015

2

Replies: 57

Views: 7K

Micrometeorite caught on camera in Oklahoma?

May 27, 2015 · Replies 3 · May 28, 2015

Replies: 3

Views: 1K

Graduate Sagittarius A*: the riddle of gas cloud G2

May 23, 2015 · Replies 9 · May 28, 2015

Replies: 9

Views: 3K

Graduate Ceres/Mars as manufacturing outposts (analytic exercise)

May 11, 2015 · Replies 32 · May 28, 2015

2

Replies: 32

Views: 4K

High School Is This Picture Really About the CNO Cycle?

May 28, 2015 · Replies 4 · May 28, 2015

Replies: 4

Views: 2K

Can You Spot All the Galaxies in This Virgo Supercluster Photo?

May 8, 2015 · Replies 8 · May 27, 2015

Replies: 8

Views: 2K

Graduate Trajectory opimization: Fast preview algorithm

May 5, 2015 · Replies 1 · May 27, 2015

Replies: 1

Views: 2K

Undergrad Can Kepler's 2nd Law be applied to more than one planet?

May 27, 2015 · Replies 6 · May 27, 2015

Replies: 6

Views: 1K

Graduate Other evidences of the Galaxys' Acceleration

May 27, 2015 · Replies 1 · May 27, 2015

Replies: 1

Views: 1K

Undergrad Question about Kepler's 1st law and barycentric orbits

May 27, 2015 · Replies 1 · May 27, 2015

Replies: 1

Views: 2K

Graduate Can We Harness Black Holes for Faster Flybys?

May 25, 2015 · Replies 2 · May 27, 2015

Replies: 2

Views: 1K

Graduate Four random quasars in a straight line?

May 15, 2015 · Replies 6 · May 27, 2015

Replies: 6

Views: 2K

Graduate When can globular clusters be considered collisionless?

May 26, 2015 · Replies 4 · May 27, 2015

Replies: 4

Views: 1K

Graduate Can you have an antimatter black hole?

May 8, 2015 · Replies 18 · May 26, 2015

Replies: 18

Views: 4K

A&C Reference Library - Astronomy & Cosmology Resources

Jan 26, 2004 · Replies 144 · May 26, 2015

5

Replies: 144

Views: 136K

High School Are Galaxies in Hubble Telescope Photos of Clusters?

May 25, 2015 · Replies 2 · May 26, 2015

Replies: 2

Views: 2K

Graduate Center of mass - cant find error in derivation

May 24, 2015 · Replies 13 · May 24, 2015

Replies: 13

Views: 3K

Graduate Questions on the Lyman Alpha Profile

Apr 29, 2015 · Replies 33 · May 24, 2015

2

Replies: 33

Views: 8K

Undergrad Can light pressure affect the motion of galaxies?

May 21, 2015 · Replies 3 · May 23, 2015

Replies: 3

Views: 2K

Undergrad Calculating an Escape from Earth's Gravity: Can It Be Done?

May 20, 2015 · Replies 4 · May 22, 2015

Replies: 4

Views: 2K

Insights Animating Black holes and Singularities - Comments

May 20, 2015 · Replies 5 · May 21, 2015

Replies: 5

Views: 2K

High School Proof that the moon is closer to Earth than the sun

May 1, 2015 · Replies 33 · May 20, 2015

2

Replies: 33

Views: 11K

Undergrad Could you send an object into space completely without fuel?

May 13, 2015 · Replies 18 · May 20, 2015

Replies: 18

Views: 2K

High School Discover the Fascinating Rotations of the Moon | Gibraltar to Auckland Views

May 19, 2015 · Replies 17 · May 20, 2015

Replies: 17

Views: 9K

Graduate Question about gravitational waves, E modes

May 16, 2015 · Replies 1 · May 16, 2015

Replies: 1

Views: 1K

Graduate General differential equation solution for Kepler Problem

May 11, 2015 · Replies 4 · May 16, 2015

Replies: 4

Views: 2K

Graduate How do galaxies die? Contradictions between two papers

May 15, 2015 · Replies 1 · May 16, 2015

Replies: 1

Views: 1K

High School Question on Comet 67P tail in Rosetta image

May 1, 2015 · Replies 12 · May 15, 2015

Replies: 12

Views: 2K

Undergrad Distance Comparison: Converting 48 Distance Modulus to Meters

May 12, 2015 · Replies 27 · May 15, 2015

Replies: 27

Views: 4K

Undergrad Confirmation on the Effect of Solar Irradiance

May 14, 2015 · Replies 7 · May 15, 2015

Replies: 7

Views: 2K

Graduate Lyman Series Wavelengths - measurement standard?

May 15, 2015 · Replies 0 · May 15, 2015

Replies: 0

Views: 2K

Graduate M31 halo paper - question on metallicity

May 10, 2015 · Replies 1 · May 14, 2015

Replies: 1

Views: 1K

High School Orbiting Eternally: Physics Q&A with Steven

May 13, 2015 · Replies 5 · May 13, 2015

Replies: 5

Views: 1K

Graduate Compatibility of General Relativity with SO(3)

May 13, 2015 · Replies 3 · May 13, 2015

Replies: 3

Views: 1K

Graduate In Need of Some (Measurable) Illumination

May 9, 2015 · Replies 10 · May 13, 2015

Replies: 10

Views: 2K

Graduate If space is curved, could it be detected

May 1, 2015 · Replies 26 · May 13, 2015

Replies: 26

Views: 4K

Graduate Is the mass of the universe finite (collection of objects)?

Apr 30, 2015 · Replies 53 · May 12, 2015

2

Replies: 53

Views: 7K

Graduate Does Relativity Alter Our Perception of Galaxies?

May 11, 2015 · Replies 5 · May 12, 2015

Replies: 5

Views: 2K

What will happen if our sun color blue?

Apr 21, 2015 · Replies 15 · May 11, 2015

Replies: 15

Views: 5K

Graduate Radio astronomical receiving system

May 10, 2015 · Replies 5 · May 11, 2015

Replies: 5

Views: 2K

Undergrad How can I know if two stars came from the same cluster?

May 8, 2015 · Replies 4 · May 11, 2015

Replies: 4

Views: 2K

Graduate Measuring Gravitational Redshift due to Galaxies without GR

May 9, 2015 · Replies 4 · May 10, 2015

Replies: 4

Views: 2K

Graduate How Far Can We Detect Faint Celestial Objects Near Our Solar System?

May 6, 2015 · Replies 6 · May 10, 2015

Replies: 6

Views: 2K

Undergrad Find Radial Velocity of Galaxies

May 9, 2015 · Replies 3 · May 9, 2015

Replies: 3

Views: 2K

Graduate What if expansion rate of a universe is the speed of light?

May 8, 2015 · Replies 8 · May 9, 2015

Replies: 8

Views: 2K

Stargazing Can I Make My Own 8 Telescope with These Required Instruments?

May 8, 2015 · Replies 2 · May 8, 2015

Replies: 2

Views: 1K

Graduate If the universe has a spin, was it causing the similar

May 8, 2015 · Replies 1 · May 8, 2015

Replies: 1

Views: 2K

Undergrad Calculating Star and Planet Positions in the Night Sky: A Mathematical Approach

May 8, 2015 · Replies 5 · May 8, 2015

Replies: 5

Views: 2K

Undergrad Is the expansion of the universe similar to an explosion?

May 5, 2015 · Replies 10 · May 7, 2015

Replies: 10

Views: 2K

High School How much energy radiates from Jupiter?

May 6, 2015 · Replies 4 · May 7, 2015

Replies: 4

Views: 2K

Undergrad Gravity moving toward the center of the Sun?

Jun 21, 2013 · Replies 20 · May 6, 2015

Replies: 20

Views: 11K

Is there any physicists i could email?

May 5, 2015 · Replies 2 · May 5, 2015

Replies: 2

Views: 1K

Graduate Gamow peak and nuclear reaction rate

May 4, 2015 · Replies 2 · May 5, 2015

Replies: 2

Views: 3K

High School What Would Happen if I Threw My Watch into a Black Hole?

Apr 15, 2015 · Replies 10 · May 5, 2015

Replies: 10

Views: 2K

Graduate Would a supermassive black hole explode?

May 4, 2015 · Replies 5 · May 4, 2015

Replies: 5

Views: 2K

Stargazing Problem in making a small refracting Telescope

May 1, 2015 · Replies 3 · May 4, 2015

Replies: 3

Views: 4K

Graduate Is Dark matter an optical illusion?

May 4, 2015 · Replies 1 · May 4, 2015

Replies: 1

Views: 2K

High School Are there any "Polar" solar system structures?

May 3, 2015 · Replies 10 · May 3, 2015

Replies: 10

Views: 2K

Graduate Calculating the event horizon of black holes.

May 3, 2015 · Replies 5 · May 3, 2015

Replies: 5

Views: 3K

Undergrad Redshift, Earth's orbital speed, and the speed of light

May 3, 2015 · Replies 1 · May 3, 2015

Replies: 1

Views: 2K

Undergrad Using the Suns gravity for propulsion

May 3, 2015 · Replies 17 · May 3, 2015

Replies: 17

Views: 2K

Stargazing Why is there no Hubble-like telescope on the International Space Station?

Apr 3, 2015 · Replies 6 · May 3, 2015

Replies: 6

Views: 3K

Graduate Predicting angle of deflection of light

May 2, 2015 · Replies 7 · May 3, 2015

Replies: 7

Views: 2K

Undergrad Loss of mass of an object falling through air

Apr 29, 2015 · Replies 8 · May 2, 2015

Replies: 8

Views: 2K

High School Conservation of momentum of collision

May 2, 2015 · Replies 2 · May 2, 2015

Replies: 2

Views: 1K

New Horizons Sees First Features on Pluto

May 1, 2015 · Replies 13 · May 1, 2015

Replies: 13

Views: 3K

Graduate Can NASA's Impossible EM Drive Revolutionize Space Travel?

May 1, 2015 · Replies 2 · May 1, 2015

Replies: 2

Views: 1K

Graduate Mass of a galaxy without dark matter and with dark matter

Apr 25, 2015 · Replies 37 · May 1, 2015

2

Replies: 37

Views: 5K

Can you see the atmosphere with you eyes or only through photos? (In space)

Apr 22, 2015 · Replies 6 · May 1, 2015

Replies: 6

Views: 4K

Undergrad Which laptop operating system do astronomers most often use?

Apr 29, 2015 · Replies 2 · Apr 30, 2015

Replies: 2

Views: 4K

Graduate Complex organic molecules discovered in protoplanetary disk

Apr 12, 2015 · Replies 5 · Apr 29, 2015

Replies: 5

Views: 3K

Graduate Supernova | Rogue Neutron Star Formation

Apr 28, 2015 · Replies 5 · Apr 29, 2015

Replies: 5

Views: 3K

Graduate Looking for the complete fusion process inside our Sun.

Apr 29, 2015 · Replies 2 · Apr 29, 2015

Replies: 2

Views: 1K

Undergrad Dark Matter is baryonic matter passed through a black hole?

Apr 28, 2015 · Replies 3 · Apr 28, 2015

Replies: 3

Views: 1K

Graduate Can a Black Hole Form Directly from a Collapsing Protostar Cloud?

Nov 20, 2014 · Replies 19 · Apr 28, 2015

Replies: 19

Views: 3K

Undergrad Globular cluster luminosity function

Apr 22, 2015 · Replies 3 · Apr 28, 2015

Replies: 3

Views: 2K

Graduate Cosmological and doppler redshift

Apr 28, 2015 · Replies 2 · Apr 28, 2015

Replies: 2

Views: 2K

Why is the Moon going above Jupiter in the sky?

Apr 27, 2015 · Replies 16 · Apr 28, 2015

Replies: 16

Views: 2K

Graduate Is Neutron Star Energy a Disappointment for Nuclear Renewables?

Apr 20, 2014 · Replies 16 · Apr 28, 2015

Replies: 16

Views: 4K

Stargazing Upgrade Your Telescope Today: Top 10-Inch Aperture Options Under £600

Apr 26, 2015 · Replies 3 · Apr 28, 2015

Replies: 3

Views: 2K

M51 Photo: 1 Hour Total Integration @ 800/5.6, ISO 2000

Apr 13, 2015 · Replies 7 · Apr 27, 2015

Replies: 7

Views: 2K

Graduate Two moons in tidal lock orbit: phases, tides, axial tilt?

Apr 2, 2015 · Replies 10 · Apr 26, 2015

Replies: 10

Views: 4K

Graduate What Was Space and Time Before the Big Bang?

Apr 26, 2015 · Replies 2 · Apr 26, 2015

Replies: 2

Views: 2K

Graduate Calculating albedo and eccentricity

Apr 24, 2015 · Replies 3 · Apr 25, 2015

Replies: 3

Views: 3K

Undergrad Can Non-Destructive Methods Stop a Giant Asteroid from Hitting Earth?

Apr 24, 2015 · Replies 9 · Apr 25, 2015

Replies: 9

Views: 2K

High School What happens if we launched a shot from a pistol in space?

Apr 25, 2015 · Replies 1 · Apr 25, 2015

Replies: 1

Views: 1K

Graduate Mystery of strange radio bursts from space

Apr 2, 2015 · Replies 63 · Apr 25, 2015

3

Replies: 63

Views: 12K

Undergrad What Happens if a Black Hole Dies or Disappears?

Apr 19, 2015 · Replies 8 · Apr 24, 2015

Replies: 8

Views: 2K

What stars/star systems can I see tonight?

Apr 24, 2015 · Replies 5 · Apr 24, 2015

Replies: 5

Views: 2K

High School Is Oxygen-Based Life Possible in Other Galaxies?

Apr 24, 2015 · Replies 3 · Apr 24, 2015

Replies: 3

Views: 2K

Undergrad Re. Dark matter. Concept of nothing

Apr 24, 2015 · Replies 2 · Apr 24, 2015

Replies: 2

Views: 1K

Graduate Flat galaxy rotation curves without dark matter

Apr 23, 2015 · Replies 1 · Apr 23, 2015

Replies: 1

Views: 3K

Undergrad Which is the most powerful black hole or a worm hole and why

Apr 21, 2015 · Replies 4 · Apr 23, 2015

Replies: 4

Views: 2K

Graduate How to check a statement about orbital angles of exoplanets?

Apr 23, 2015 · Replies 2 · Apr 23, 2015

Replies: 2

Views: 2K

Astronomy

Astronomy is the scientific study of celestial objects and phenomena beyond Earth's atmosphere. It encompasses the observation and analysis of stars, planets, galaxies, and other celestial bodies, as well as the broader exploration of the universe's origins, structure, and evolution.

Astronomers employ a variety of tools, including telescopes, satellites, and advanced instrumentation, to gather data and uncover the mysteries of the cosmos. The field addresses questions about the nature of dark matter, the expansion of the universe, and the potential for extraterrestrial life.

Astronomy not only contributes to our understanding of the cosmos but also inspires wonder and curiosity about the vastness and complexity of the universe we inhabit.

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